Centrifugal sand screening and separating machine.



E. F. ANDERSON.

GENTRIFUGAL SAND SCREENING AND SEPARATING' MAGHINE. APPLICATION FILED FEB.16, 1914.

1 ,108,54=2, Patented Aug. 25, 1914.

2 SHEETS-SHEET 1.

7 if/wry;

E. F. ANDERSON.

'CENTRIFUGAL SAND SGREENING AND SEPARATING MACHINE.

APPLICATION FILED rBn,1s, 1s14.

1, 1 08,542. Patented Aug. 25, 1914.

2 SHEETS-SHEET 2.

y 44 A? g awue/Mmz UNITED STATES PATENT ornron.

ELBERT FINLEY Annnnson, or URBANA, rumors.

cnnrmruean slann scnnnnme Ann snrnnarme MACHINE.

anew and useful Centrifugal Sand Screening 1 and Separatlng Machlne; and I do hereby declare the following to be a full,

clear, and exact description of the invention, such as will enable others skilled 1n theart 1 to which it appertains to make and use the same. V I

Th1s invention relates to a new and useful 1 improved centrifugal sand screening or separating machlne, and an ob ect of the "invention is the provision of such a machine having a spinning table, on which any grade of sand or the like falls or deposits from a hopper, and as the spinning table revolves, the sand is swirled by centrifugal force againstscreening means, the finer particles passing through the screen, and

emptying through an outlet, while the larger particles fall through another hoppein In this way thesand is separated or screened from the gravel. The hopper is provided with a series of rods to separate the stones and the like. i i

In practical fields the details of 0011-.

struction may be subjected to alterations, falling wlthni the scope of what is claimed. The invention comprises further features and combination of parts, as hereinafter set forth, shown 1n the drawings and claimed.

In the drawings :Figure 1 is a view in perspective of the improved sand screening or separating machine. Fig. 2 is a vertical sectional view. Fig. 3 is a transverse sectional view. Fig. 4: is a view similar to 2 showing the screening; means and the casing with the outlet spouts lowered, whereby the material from the hopper may fall with greater force upon the spinning table. Fig. 5 is a detailview of the spinning table.

Referring more particularly to the drawing's, 1 designates a frame constructed of tubular rods 2 disposedivertically and the upper and lower horizontally disposed rods 3 and 41, which are joined together by the unions 5. Supported upon the upper rods of the frame is a hopper 6, which is rectangular in plan view and constructed of sheet metal or othersuitable material. Two of the sides of the hopper, as will be observed, are provided with inclined edges 7,

Specification of Letters Patent. Application filed February 16, 1914, Serial No. 318,971.

Patented An. 25, 1.914.

and disposed parallel with said edges is a series oit rods or bars 8, through which at the ends of said bars, rods 9 and 10 extend.

These rods 9 and 10 also pass through the sides of the hopper and secured in place by the nuts 11. Upon therods 9 andlO are members 12 and 13, for holding the bars or rods 8 equally spaced apart. which is mounted in the sides of the hopper also extendsthrough bars or rods 8 to support their central portions. gravel and stones combined are thrown upon the rods 8, the grave]. and sand passing through and falling upon the inclined. p0rtion 15 of the bottom ofthe hopper, while the stones and the like are screened therefrom by the rods 8, which, as before stated, are disposed upon an inclination, so as to cause the stones and the like to be carrie to one side of the machine. "The inclined portion 15 of the bottom of the hopper A red 14:, i p

The sand,

The

an annularly disposed flange 23 extending within the cylindrical screen 2&1, which surrounds the spinning table 25 and spaced apart therefrom. This flange holds the cover or closure 18 in place.

Extending within the main casing 19 is a supplemental casing 26, the upper periphcry 27 of which corresponds in diameter to the diameter of the cylindricalscreen 24: and secured thereto, in any suitable manner.

The supplemental casing 26 extends through the inclined wall 28 of the casing 19 and terminutes in an outlet spout 29, while the main easing terminates in an outlet spout 30. Mounted in bearings of the casings and in a bearing 31 of a transverse bar 32 is a vertical shaft 33, on which the spinning table 25 is adjustably mounted by means of the thumb screw 34. The lower end of the shaft 33 is mounted on a thrust bearing 35 of the lower bars or rods or tubes 4 of the frame. Mounted in a bearing 36 of a bracket 37, which rises from the tubes at, is a shaft 38, which is also mounted in a bearing 39 of one of the vertical rods 2. This shaft 38 has a beveled gear a at one end, and a crank 41 at the other. The beveled gear 4E0 meshes with a beveled pinion 42 of the vertical shaft 33, and by turning the crank 41 motion may be imparted to the shaft 38 which in turn rotates the shaft 33 through the meshing ofthe gears and 12. As the shaft 33 is revolved or rotated, the spinning table is likewise rotated. The upper face of the spinning table is constructed with a series of curved flanges or ribs 43, extending from the center of the table to the periphery. As the combination sand and gravel is deposited upon the up er face of the spinning table from the spout 16 of the hopper, the same is swirled by the centrifugal force and the curved flanges against cylindrical wall of screening 24, the finer particles of sand passing through the screen into the casing 19 from whence it leaves through the outlet spout 30, while the gravel passes through the casing 26 through the outlet 29. By lowering the casing and the spinning table, the distance between the out- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patentl,

the sprocket 39 is a sprocket chain 39, which also passes about the sprocket wheel 39 having acrank 39 The sprocket Wheel 39. is carried by a stub shaft mounted in a bearing 39 of one of the vertical rods.

structure shown in Figs. 1 and 2 is identical with the structure shown in the other figures.

The invention having been set forth, what is claimed as new and useful is In a machine for se arating sand and gravel, a frame, main and ings having screening means therebetween and being adjustably mounted in said frame, a hopper having an outlet spout connected to the main casing, a vertical shaft mounted in bearings of the frame and the casings, a revoluble member on the vertical shaft provided with curved flanges extending from the center of the revoluble member to its periphery, said flanges through the medium of the centrifugal force of the revoluble.

Washington, D. G. I a

By A manipulating the crank 39 motion may be. transmitted to the shaft 33. Otherwise the supplemental cas-- 

